Process of chlorinating.



UNITED STATES PATENT OFFICE.

MAX BUCHNER, OF MAI \TNHEIM. GERMANY, ASSIGNOR TO 0. F. BOEHRINGER & SOEHNE,

' OF MANNHEIM-WALDHOE. GERMANY.

1,129,165. He Drawing clare the following to be a'full, clear, and

exact description of the invention, such as will enable others skilled inthe art to which it a pertains to make and use the same.

' fy invention relates to an improved procr the chlorination 'of oleaginous matcrials such as cilsand fats, ,the oils being either-the ordinary oils or petroleum products. Consistent oleaginous materials, such as paraflin and other waxes, and even resinous bodies, may be treated.

My invention, broadly considered, consists in carrying out the chlorination of such material in the presence of carbon tetrachlorid to produce highly chlorinated substances.- This may be done either at normal or at higher temperatures and at any desired pressure, as for example at atmospheric pressure or higher.

Many attempts have been made heretofore to chlorinate oils, fats, resins and paraffins by heating these bodies and then leading chlorin into contact with them, or by treating them withchlorin in the presence ofnnalkali, or by heatin them with aluminum chlorid,' but none 0 these processes so far as known to me have been entirely satisfactory. For example, the first mentioned process gives strongly colored, badly colcred, smenry or very sticky products, which properties mjuriously affect the utility of such products. Furthermore, chlorinated paraffin-obtained in thisavay is a doughlike product strongly impregnated with hydro-chloric acid, .w ich can be driven o'fl completely from the doughy product only with the greatest difliculty.

By the method of chlorination in the presence of alkali or by the use of aluminum chlorid, the chlorination actionlags behind an action of oxidation and condensation which also forms a part of the reaction.

All the above-mentioned prior methods of chlorination have the common disadvantage that they give products with a restricted content of chlorin, that is to say the chlorination of the material beingtreated cannot be pushed beyond a certain limit. By my process, on the' contrary, there can be ob- Speciflcatlon 01- .Letters Patent.

Application filed November 13. 1911. Serial No. 680,848.

creased with such a. decrease of Patented Feb. 23', 1915.

tained completely pure high-chlorinated products of a clear color, whose chlorin contents can be increased from any desired limit up to the highest possible content materially beyond that hitherto attainable by any prior processes of which I am aware. Fiirthermore, by my process the consistency is inthe pastiness that hi hly chlorinated bodies may be Droduced WTllCh are completely solid at usual temperatures and do not show further any pasty substance. Many of these re sultmg products have a melting point about 100 to 115.

It is to be noted that the carbon tetrachlorid in my improved process does not work merely as a solvent, but in fact also acts as a reaction accelerator, For example,

by the introduction of chlorin into a solutron of parafiin in carbon tetrachlorid, even at a temperature of 70 to 15 0., a product is produced with a chlorin content of 77%, While by the introduction of chlorin into parafiin, according to the methods heret0- fore proposed, the porafiin being heated to about 120 to 150 products are-obtained containing only about of chlorin. As at the said temperature of 120 to 150 C. the reaction mass is a. very thin fluid, it .is clear that the failure of the process to carry the chlorination above 60% cannot be due to any merel mechanical hindrance. By my process, rthermore, the incompletely chlorinated products obtained by the said prior processes may be still further chlorinated to com letion. A further and very striking prooi that the carbon-tetrachlorid does not act in my process merely'as'a solvent is the fact that by my said process bodies which are only-slightly solubleor in fact, practically insoluble in carbon tetrachlorid, such for example as copal resin, may be chlorinated in the presence of the carbon tetrachlorid to form compounds having a high chlorin content. This fact is the more unexpected because according to the teaching of the prior art it was supposed that the prescnce of hydro-chloric acid prevented the chlorination.

- While in the'presence of alkali copal resin takes up only 12% of chlorin, still by my process products having 35 to 56% of chlorin mziy be obtained from ccpal resin.

11 carrying out my process the material to be treated is dissolved or suspended in carbon tetrachlorid, and chlorin is led into .the solution o'ri inixture until the -roduct has received the desired amount. 'e 'temperature may be at-normal or, higher and the pressure may be atmospheric or abore; The

7 process of chlorination is favorably influenced by ,the actionof -direct sunlight or any artificial source of light containing as -coatingrimpregnating mater-in chemical] active rays.

1 The 'Oh orinnted products obtained liy my;

process as n'liov'e described inay be emiisloyed what'zl 'claim is:

'Havingthu'sfullj described'nij'invention, 1

n es q e' chlo n te wi h material whichjco n'prises mix the substances to be chlorinated with car 'on tetra-.-

chlori dand introducing chlorin into the mixture while heating thesame.

for 4 a vsi'gnature in the ,.2 The process of chlorinating; oleaginous- "3. lfheprccess of chlorinating olenginous -materialwhichcomprises mixing the sub stances-to he chlorinated withcarbon tetra.-

vchlmn id and introducing chlorin into the mixture while subjecting the same to the vaction of chemically active light rays.

"4. The process of chlorinating-oleaginous material which- -cornprises mixing the substancesto be chlorinated with carbon tetrachlorid and introducing. -chlorin into the mixture vhile-subjectingthe sameto, the action ofheat and of chemically-acti re lightrays.

5. The of furtherbodies previously chlorinated to a restrictc amount, which, consists in subjecting said.

bodies;to the-.-action-of chlorin in the presence of carbon ,tetrachlorid.

In tatimony whereof I hereunto hin-inf mmxmommn Witnessesb i .D-',NAIUEN1 Wnnnm C. Tercmrm..

presence 'qfi tvrq witnesses. 45 

